LetsTrust TPM - Infineon OPTIGA SLB 9672 TPM 2.0 Cryptographic Module for Raspberry Pi

Description

TPM 2.0 cryptographic module featuring the Infineon OPTIGA SLB 9672 chip, designed for use with Raspberry Pi single-board computers. LetsTrust TPM enables secure cryptographic key storage, authentication and digital signature operations, and cryptographic key management. The integrated true hardware random number generator (TRNG) provides random data for cryptographic applications. The module is suitable for systems requiring hardware-based key protection, device identity verification, and secure communication.

The Infineon OPTIGA SLB 9672 chip complies with the TPM 2.0 Rev. 01.59 specification and runs firmware version 15.24 or later. Communication with Raspberry Pi is handled through the SPI interface. The module is compatible with Raspberry Pi 1, 2, 3, 3B+, 4, 5, Zero, and 400 models, with Raspberry Pi 400 requiring an adapter cable. When used with Raspberry Pi 5 equipped with a standard cooling solution, an additional GPIO stacking header may be required.

The compact design uses a 2x5-pin connector, occupying physical pins 17 to 26 on the Raspberry Pi 40-pin header. The remaining GPIO header pins are available for connecting additional modules and devices. LetsTrust TPM can be installed directly onto the GPIO header or optionally soldered to its pins. Its small size facilitates installation in standard Raspberry Pi enclosures.

The module supports Raspberry Pi OS (formerly Raspbian) with Linux kernel version 4.14.85 or later, using Device Tree Overlay configuration. The manufacturer also specifies support for Windows 10 IoT Core on Raspberry Pi 2, 3, and 3B+. Tools such as TPM2 Software and Infineon Embedded Linux TPM Toolbox 2 can be used for configuration, diagnostics, and TPM functionality management. The module is designed and manufactured in Germany.

Features

• Model: LetsTrust TPM
• Cryptographic chip: Infineon OPTIGA SLB 9672
• Standard: TPM 2.0 Rev. 01.59
• Firmware version: 15.24 or later
• Functions: cryptographic key storage, authentication, digital signatures
• True hardware random number generator (TRNG)
• Communication interface: SPI
• Compatibility: Raspberry Pi 1, 2, 3, 3B+, 4, 5, Zero, and 400
• Raspberry Pi 400: adapter cable required
• Raspberry Pi 5: a GPIO stacking header may be required when using a standard cooling solution
• Connector: 2x5 GPIO pins, occupying physical pins 17 to 26
• Option to solder directly to Raspberry Pi GPIO header pins
• Raspberry Pi OS / Raspbian support from Linux kernel 4.14.85 via Device Tree Overlay
• Windows 10 IoT Core support on Raspberry Pi 2, 3, and 3B+
• Supported tools: TPM2 Software, Infineon Embedded Linux TPM Toolbox 2
• Country of manufacture: Germany

Kit Includes

• 1x LetsTrust TPM module with Infineon OPTIGA SLB 9672 chip
• 1x 8-pin auxiliary header for correctly positioning the module on the Raspberry Pi GPIO connector